| Patents for E21B 49 - Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells (11,875) |
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| 11/10/1993 | EP0568746A2 Determining stimulation related characteristics of subterranean zone |
| 11/09/1993 | US5259450 Vented packer for sampling well |
| 11/02/1993 | US5257528 Device for studying the aging of a circulating fluid under specific imposed conditions |
| 10/28/1993 | WO1993021420A1 Method for measuring formation fluids in drilling fluid |
| 10/28/1993 | CA2117752A1 Method for measuring formation fluids in drilling fluid |
| 10/26/1993 | US5256572 Method for determining residual oil saturation of a watered-out reservoir |
| 10/20/1993 | EP0566382A1 Shut-in tools |
| 10/19/1993 | US5253719 Process for diagnosing formation damage mechanism through the use of radially oriented core samples cut from the wellbore wall |
| 10/19/1993 | US5253519 Method and apparatus for in-situ measurement of ground heave characteristics |
| 10/19/1993 | US5253518 Testing at different pore pressures |
| 10/15/1993 | CA2235969A1 Method of operating a downhole shut-in tool |
| 10/15/1993 | CA2235956A1 Method of automatically controlled sampling of well fluid from a well |
| 10/15/1993 | CA2235954A1 A controller for a downhole apparatus |
| 10/15/1993 | CA2235949A1 Mechanical actuator for a downhole tool |
| 10/13/1993 | EP0565323A1 Borehole stressed packer inflation system |
| 10/12/1993 | CA1322872C Method and an apparatus for taking soil samples |
| 10/06/1993 | EP0457791B1 Device for taking soil samples |
| 10/05/1993 | US5251286 Method for estimating formation permeability from wireline logs using neural networks |
| 10/05/1993 | US5249461 Method for testing perforating and testing an open wellbore |
| 09/30/1993 | WO1993019354A1 Process for chemical logging of a liquid and plant for carrying out said process |
| 09/30/1993 | CA2132217A1 Process for chemical logging of a liquid and plant for carrying out said process |
| 09/28/1993 | US5247830 Method for determining hydraulic properties of formations surrounding a borehole |
| 09/28/1993 | US5247829 Method for individually characterizing the layers of a hydrocarbon subsurface reservoir |
| 09/22/1993 | EP0561492A2 Method for estimating formation permeability from wireline logs using neural networks |
| 09/22/1993 | EP0527924A4 Underground fluid sampling system |
| 09/21/1993 | US5246861 Use of nonradioactive complex metal anion as tracer in subterranean reservoirs |
| 09/17/1993 | CA2078402A1 Method for estimating formation permeability from wireline logs using neural networks |
| 09/16/1993 | DE4307252A1 Measuring three=dimensional stress in rock surrounding borehole - measuring strain deformation adjacent to slots cut into borehole wall at different angles. |
| 09/15/1993 | EP0560150A1 Method and apparatus for determining the geohydraulic permeability of a surface through which ground water flows |
| 09/14/1993 | US5243855 Apparatuses and methods for measuring ultrasonic velocities in materials |
| 09/08/1993 | EP0559286A1 Formation evaluation tool |
| 09/08/1993 | EP0558694A1 Electro-hydraulic deep well sampling device |
| 09/08/1993 | EP0558534A1 Well completion system |
| 09/08/1993 | EP0418356B1 Process and device for taking samples at a ground water measurement site |
| 09/07/1993 | US5241869 Device for taking a fluid sample from a well |
| 09/02/1993 | WO1993017326A1 Analysis of drilling fluids |
| 08/31/1993 | US5241475 Method of evaluating fluid loss in subsurface fracturing operations |
| 08/31/1993 | US5240072 Multiple sample annulus pressure responsive sampler |
| 08/24/1993 | US5238060 Sampling pump with packer |
| 08/19/1993 | WO1993016366A1 Liquid/gas flow sampling |
| 08/18/1993 | EP0555965A2 Controlled gas trap system |
| 08/17/1993 | US5237539 System and method for processing and displaying well logging data during drilling |
| 08/17/1993 | US5236040 Method for determining the minimum principle horizontal stress within a formation through use of a wireline retrievable circumferential acoustic scanning tool during an open hole microfrac test |
| 08/15/1993 | CA2086876A1 Controlled gas trap system |
| 08/10/1993 | US5234057 Shut-in tools |
| 08/10/1993 | US5233866 Apparatus and method for accurately measuring formation pressures |
| 08/10/1993 | US5233863 Fluid loss measuring system and method |
| 08/05/1993 | WO1993005366A3 Mass flow meter |
| 08/04/1993 | EP0554013A1 Drill stem testing with tubing conveyed perforation |
| 08/03/1993 | US5233568 Method of estimating shale fraction |
| 08/03/1993 | US5233409 Color analysis of organic constituents in sedimentary rocks for thermal maturity |
| 07/28/1993 | EP0491841A4 Pore pressure prediction method |
| 07/27/1993 | US5230244 Formation flush pump system for use in a wireline formation test tool |
| 07/22/1993 | WO1993014295A1 Well fluid sampling tool and well fluid sampling method |
| 07/20/1993 | US5228517 Method and apparatus for collecting percolating fluids and apparatus for the installation thereof |
| 07/20/1993 | CA1320433C Above packer perforate, test and sample tool and method of use |
| 07/15/1993 | DE4200426A1 Compartmented grooved rod soil sample removal unit with tubular casing - has filling slot and cutting edge moving against each other with control resulting across follower and stop ring. |
| 07/14/1993 | EP0551134A1 Method for evaluating formations and bit conditions |
| 07/13/1993 | US5226310 Methods and apparatuses for measurement of the strengths, pore pressures, and mechanical properties of low permeability geologic materials |
| 07/13/1993 | CA1320123C Analyzing a hydrocarbon reservoir by determining the response of that reservoir to tidal forces |
| 07/06/1993 | US5224389 Method and apparatus for taking samples from a groundwater monitoring site |
| 07/06/1993 | CA1320007C Method for determining residual oil saturation of a gas-saturated reservoir |
| 06/30/1993 | EP0548765A2 System for soil decontamination using recoverable extraction and injection probes |
| 06/22/1993 | US5220829 Downhole formation pump |
| 06/21/1993 | CA2084227A1 Recoverable extraction and injection probe for enhanced gradient remediation |
| 06/16/1993 | EP0546157A1 Method and device for evaluating the production quality of a well, particularly an oil well |
| 06/15/1993 | US5220504 Evaluating properties of porous formations |
| 06/15/1993 | US5219388 Method and apparatus for testing water permeability of concrete |
| 06/10/1993 | WO1993011307A1 Processes for local ground treatment, especially testing and cleaning polluted ground |
| 06/08/1993 | US5216917 Method of determining the drilling conditions associated with the drilling of a formation with a drag bit |
| 06/02/1993 | EP0543944A1 A method and an apparatus for taking and analysing level determined samples of pore gas/liquid from a subterranean formation. |
| 05/25/1993 | US5214384 Method including electrical self potential measurements for detecting multiphase flow in a cased hole |
| 05/25/1993 | CA1318241C Above packer perforate test and sample tool and method of use |
| 05/22/1993 | CA2083483A1 Hydraulic system for electronically controlled pressure activated downhole testing tool |
| 05/18/1993 | US5212093 Method to determine drift and residual oil saturation |
| 05/18/1993 | US5211842 Three-phase well test apparatus using pumped recirculation to maintain homogenous flow |
| 05/18/1993 | US5211715 Coring with tubing run tools from a producing well |
| 05/18/1993 | US5211203 Portable self-contained ground water testing assembly |
| 05/12/1993 | CN2132831Y Pole-free sampler combined with hydraulic piston pump |
| 05/12/1993 | CN1020649C Process for simulating obtaining hydrocarbon by pilot test in deposit |
| 05/11/1993 | US5209309 For removing a selected selection of the formation within a bore hole |
| 05/11/1993 | US5209129 Subsurface sampler |
| 05/04/1993 | US5207104 Method for determination of the in situ compressive strength of formations penetrated by a well borehole |
| 05/04/1993 | US5207096 Advanced method and device for improving the production logs of an activated nonflowing well |
| 04/29/1993 | WO1993008369A1 A device for the positioning of a mixing body with respect to a fluid flow area |
| 04/28/1993 | EP0539020A1 Annulus pressure responsive downhole tool |
| 04/27/1993 | US5205164 Methods for determining in situ shale strengths, elastic properties, pore pressures, formation stresses, and drilling fluid parameters |
| 04/27/1993 | CA1316814C Apparatus and method for analyzing well fluid sag |
| 04/22/1993 | CA2081083A1 Low pressure responsive downhole tool with hydraulic lockout |
| 04/20/1993 | US5203824 Method and apparatus for preparing the surface of a region of soil for further testing |
| 04/20/1993 | CA1316525C Method of determining the porosity of an underground formation being drilled |
| 04/15/1993 | WO1993007453A1 Mobile inductively coupled plasma system |
| 04/15/1993 | DE4133790A1 Process for sampling contaminated ground water from bore-holes - using a pressure activated filter pipe integrated with the drill pipe at a known level |
| 04/13/1993 | US5201220 Apparatus and method for detecting the presence of gas in a borehole flow stream |
| 04/13/1993 | US5201219 Method and apparatus for measuring free hydrocarbons and hydrocarbons potential from whole core |
| 04/13/1993 | CA1316167C Method for determining drilling conditions while drilling |
| 04/06/1993 | US5199509 Controlled gas trap system |
| 03/31/1993 | EP0534732A1 Downhole sampling apparatus |
| 03/31/1993 | EP0534715A1 Method and apparatus for preparing the surface of a region of soil for further testing |
| 03/30/1993 | CA1315193C Preventing fines migration by producing from horizontal holes |